NI TBX-50 and NI TBX-50B Documentation
Overview
This article explains the key differences between the discontinued TBX-50 and its replacement, the TBX-50B. It also provides a link to documentation for the TBX-50B.
Due to a supply shortage, NI discontinued the NI TBX-50 (P/N: 779305-01) and replaced it with a similar screw terminal accessory, the NI TBX-50B (P/N: 782866-01). The original "Read Me First NI TBX-50" documentation was incorrectly removed in the driver after the transition to the new product.
More information on the TBX-50B can be found in the Read Me First article.
The table below shows the detailed difference between the old and new accessories.
| TBX-50 | TBX-50B | |
| NI Part Number | 779305-01 | 782866-01 |
| Max Voltage (V) | 125 | 150 |
| Max Current (UL Recognition, A) | 2.5 | 2.5 |
| Length (mm) | 71 | 98.2 |
| Width (mm) | 86 | 69 |
| # of Positions | 50 | 50 |
| Connector Type | 50-Pin D-Sub, Male | 50-Pin D-Sub, Male |
| Mounting Method | DIN Rail | DIN Rail |
The image below shows the differences in physical appearance between the terminal blocks.
